149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
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/* mnc: mini-netcat - built from the ground up for LRP
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Copyright (C) 1998 Charles P. Wright
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0.0.1 6K It works.
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0.0.2 5K Smaller and you can also check the exit condition if you wish.
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19980918 Busy Boxed! Dave Cinege
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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const char mnc_usage[] =
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"mini-netcat 0.0.1 -- Open pipe to IP:port\n"
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"\tmnc [IP] [port]\n";
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int
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mnc_main(struct FileInfo * i, int argc, char **argv)
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{
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int sfd;
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int result;
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int len;
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int pid;
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char ch;
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struct sockaddr_in address;
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struct hostent *hostinfo;
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#ifdef SELECT
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fd_set readfds, testfds;
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#endif
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sfd = socket(AF_INET, SOCK_STREAM, 0);
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hostinfo = (struct hostent *) gethostbyname(argv[1]);
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if (!hostinfo)
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{
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exit(1);
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}
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address.sin_family = AF_INET;
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address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
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address.sin_port = htons(atoi(argv[2]));
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len = sizeof(address);
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result = connect(sfd, (struct sockaddr *)&address, len);
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if (result < 0)
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{
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exit(2);
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}
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#ifdef SELECT
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FD_ZERO(&readfds);
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FD_SET(sfd, &readfds);
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FD_SET(fileno(stdin), &readfds);
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while(1)
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{
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int fd;
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int nread;
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testfds = readfds;
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result = select(FD_SETSIZE, &testfds, (fd_set *) NULL, (fd_set *) NULL, (struct timeval *) 0);
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if(result < 1)
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{
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exit(3);
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}
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for(fd = 0; fd < FD_SETSIZE; fd++)
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{
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if(FD_ISSET(fd,&testfds))
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{
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ioctl(fd, FIONREAD, &nread);
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if (nread == 0)
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exit(0);
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if(fd == sfd)
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{
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read(sfd, &ch, 1);
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write(fileno(stdout), &ch, 1);
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}
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else
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{
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read(fileno(stdin), &ch, 1);
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write(sfd, &ch, 1);
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}
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}
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}
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}
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#else
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pid = fork();
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if (!pid)
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{
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int retval;
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retval = 1;
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while(retval == 1)
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{
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retval = read(fileno(stdin), &ch, 1);
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write(sfd, &ch, 1);
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}
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}
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else
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{
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int retval;
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retval = 1;
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while(retval == 1)
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{
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retval = read(sfd, &ch, 1);
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write(fileno(stdout), &ch, 1);
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}
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}
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exit(0);
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#endif
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}
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